William h



1 WILLIAM H. NoErHALL,

UN E STATES:

PATENT Err CE.

SLlDlNG-JAW VISE.

SPECIFICATION forming part of Letters Patent No. 292,135, dated January 15, 1824. Application filed June 12,1883. (No model.)

- This invention relates to improvements in slidingjaw vises; and it consists in the combination,with one of the jaws of a vise and its clamping-screw, and the fixed jaw and body connected operating of a vise, of one or more sectional nuts, adapted to be engaged with and disengaged from the clam ping-screw by rotating the latter, the object being to provide a vise of improved construction, one of whose jaws is capable of being moved toward and from. the other one independent of the clamping-screw, to quickly open. the-jaws and set them against an object t'o1be held between them, before employing the said-screwto force one jaw against the other.

In thedrawingsforming part of this speci= fioation, Figure 1 is a side elevation, and Fig, 2 alongitudinal' section, of a vise embodying my invention. Fig. 3 is a transverse section onithe line 3 y,-Fig.' 1. Fig. 4 is a perspective of onset the nuts and certain of its directly detailip'artsrv In the drawings, B is the body of the vise, on which is the fixed jaw, and it is properly chambered to admit through it the tail part of the sliding jaw A, and permit the latter, with the clamping-screw c, which is fitted to rotate therein, to have a free sliding movement in said body, whereby one jaw is moved from and toward the other. The clampingscrew 0 is grooved longitudinally, and has fitted upon it a tubular cam, '12, provided with a spline-key fitting said groove, whereby said cam is made to rotate with said screw; but the latter may freely slide in the cam. The form of that part of cam C which is in connection with the sectional nuts, as hereinafter described, is shown in section in Fig. 3, it being provided at that point with two cam projections, o '0, opposite each other. Said projectionsv are in a groove on the cam, as shown -bearin gs for the aforesaid nuts.

parts. Fig. 5 illustrates.

'in Fig. '2. The cam o is placed on the screw. 0, the latter passed through the-part A, and the screw is secured-to the part A by a nut,.4, on its end in the usual manner.

c, through which operates the usual turning bar, as shown.

The sides of the body of the vise B are pro-- vided with bosses e, to provide'suitable thickness on opposite sides in which to make proper lperf orated to receive, opposite each other, the

sectional nuts (2, which are of block form, and."

{have a screw-thread in one edge correspond Said sides are The usual 1 head is formed on the outer end of, the screw vging to that on the screw 0. The outer end'of jthe nut is bored to receive in a cavity so formed a spiral spring, 0, and the nut having ;been placed in its bearing in the body B, spring i0 is forced into the nut, and a screw, a, is

gpassed through the upper side of the boss 6 1' through an opening in the top of the nut and behind the spring 0, forming a fixed abutment ;f0r one end of the latter, and causing the force ?of said spring to be exerted against the nut to" ,Iforce it against screw 0 and make it engage'j therewith. The nut d is held in engagement.

,with the screw 0 by a bolt, n,which is inserted ,in a cavity in said nut, in which, behind said.

(Shown in dotted ilines inFigs. 1 and 2, and the end of it is' fshown in Fig. 3.) The bolt 1 operates trans versely to the motion of the'nut relative to: screw 0, and when the nut is against the latter jbolt, is a spiral spring, 3.

the outer end of said bolt enters a hole in the boss 6, as shown in Fig. 1, firmly locking the nut, so that whatever may be the strain upon the nut when the screw is turned to force the jaws together, it cannot slide back. In addition to the bolt n, the nutd is provided with a cam lever, :2, having an elongated hole through it, and hung on apin, 2, on the nut,

and a wedge, as, having a wide endnext to lever 2, its opposite end reaching by the arm n on bolt a, and having an incline, w, thereon,

adapted to be forced against the beveled edge of said arm at; when the nut and its-parts, as shown in Fig. 4, is placed in the body B, as in Figs. 1 and 2, the said lever, wedge, and bolt are brought to the positions shown in the latter figure, being held up against the nut by the adjoining side of the boss 0. When one or both of nuts (I are placed in the body B, the cam 12 is moved on screw 0, to bring its groove, in which are the projections 12 o, opposite the ends of the levers 5, which ends lie in said groove and on the projections just named.

By reference to Fig. 3 it will be seen that the ends of the levers :2 lie one above and one below screw 0, and in positions to be simultaneously acted on by the-eam t. hen the screw 0 and cam o are turned to the right to move jaw A toward the fixed jaw, the lovers 2 swing on the pins 2 and drop off from the ends of the projections o o as the latter 'come around under them, having no effect on the nuts; but when the screw 0 is turned back or to the left the projections 11' o are forced against the ends of levers 2, thereby driving them in a direction away from the axis of the cam. The function of each cam-projection c is that of an arm having a rotary motion around the axis of the screw 0 against the end of lever 2, when said screw is turned backward. The lever z hasa sliding movement on pin 2 in a direction from screw 0, given to it by the contact of said projection o with it. The result of said sliding movement of lever z is to force wedge a? in the same direction and draw'bolt a back into the nut (1 clear from boss e. Lever z then comes to a stop so far as its'movement independent of the nut is concerned, said movement being first opposed by the action of spring 3 behind bolt n, and if the force of said spring does not proveasufficient abutment to hold lever z while the nut moves back,the pending flange on wedge 00 will strike against the shoulder of the nut-section to effect the movement of the nut away from'the screw, leaving the latter free to be moved longitudinally between the nuts and in the cam 2 the screw being held meanwhile to keep the nuts back. The aforesaid back movement of the nuts (I is indicated by the dotted lines in Fig. 2. While screw 0 is turned back and so held by the'op'erator, the nuts (I are kept away from the screw '0, and the movable jaw and its tail part, together with screw 0, may be freely moved back and forth in the body B, and by releasing screw 0 the nuts (1 return to their places against the screw, so that by turning the latter to the right the jaws may be clamped forcibly together. Vhen screw 0 is released, as aforesaid, the springs o in the nuts drive them against the screw, and as soon as the nuts have moved inward to their proper places the bolts a slip into their holes in the bosses c and firmly lock them.

To operate the vise, screw 0 is turned back to throw out the nuts, the movable jaw is drawn away from the fixed one, the piece to be screwed into the vise is placed against the latter jaw, the movable one is pushed against said piece, and the screw is then turned to the right, fastening said piece firmly between the jaws. One nut serves to operate the vise as well as two; but additional strength and force is gained by having nuts to engage eaclrside of screwe.

What I-claim as my invention is 1. In a sliding-jaw vise, the combination, with the body,the movable j aw,and the clamping-screw thereof, of one or more sectional nuts, substantially as described, attached to .said body, and mechanism, substantially'as described, for operating said not or nuts by and under the control of the said screw, to move them toward and from the latter, sub stantially as set forth.

2. The combination, with the body and the movable jaw of a sliding-jaw vise, of a'longitudinally-groovcd clamping-screw, of a cam fitted on said screw and having a splined connection therewith, of one or more sectional nuts attached to said body, each of which is provided with a cam-lever, a wedge, and a locking-bolt, substantially as described, and

springs o and 8, all as set forth.

3. The combination, with the body 13, the sliding jaw A, the screw 0, and the cam "0, :0f the nut 11, the springs 0 and 3, the lever z,'the wedge a, and the bolt 12, substantially as set forth.

\VILLIAM H. XORTHA-IJL.

Vitncsses:

, ALFRED B. BEERB,

J. CHAS. GORMLEY. 

